AK4438 Datasheet, PDF (5/63 Pages) Asahi Kasei Microsystems – 108dB 768kHz 32bit 8-Channel Audio DAC

[AK4438]
■ Pin Functions
No. Pin Name I/O PD state Function
1 MCLK
2 BICK
3 LRCK
4 SDTI1
5 SDTI2
6 SDTI3
7 SDTI4
8 ^DZF
9 PDN
I
Hi-z External Master Clock Input Pin
I
Hi-z Audio Serial Data Clock Pin
I
Hi-z Input Channel Clock Pin
I
Hi-z Audio Serial Data Input
I
Hi-z Audio Serial Data Input
I
Hi-z Audio Serial Data Input
I
Hi-z Audio Serial Data Input
O 50kΩ Zero Input Detect in I2C Bus or 3-wire serial control mode
Pull-down
Power-Down & Reset Pin.
I
Hi-z
When “L”, the AK4438 is powered-down and the control registers are reset to
default state.
Soft Mute Pin in Parallel control mode.
10 ^SMUTE
I
Hi-z
When this pin is changed to “H”, soft mute cycle is initiated. When returning
“L”, the output mute releases.
CAD1
I
SDA
I/O
Chip Address 1 Pin in I²C Bus or 3-wire serial control mode
Control Data Input Pin in I²C Bus serial control mode
11 CDTI
I
Hi-z Control Data Input Pin in 3-wire serial control mode
TDM0
I
SCL
I
TDM Mode select pin in Parallel control mode.
Control Data Clock Pin in I²C Bus serial control mode
12 CCLK
I
Hi-z Control Data Clock Pin in 3-wire serial control mode
TDM1
I
CAD0_I2C I
TDM Mode select pin in Parallel control mode.
Chip Address 0 Pin in I²C Bus serial control mode
13 ^CSN
DIF
I
I
Hi-z
Chip Select Pin in 3-wire serial control mode
Audio Data Format Select in Parallel control mode.
“L”: 32bit MSB, “H”: 32bit I2S
14 ^PS
I
(I2C pin = “H”) Control Mode Select Pin
Hi-z
“L”: I²C Bus serial control mode, “H”: Parallel control mode.
CAD0_SPI I
(I2C pin = “L”) Chip Address 0 Pin in 3-wire serial control mode
15 AOUTL1 O
Hi-z Lch Analog Output Pin
16 AOUTR1 O
Hi-z Rch Analog Output Pin
17 AOUTL2 O
Hi-z Lch Analog Output Pin
18 AOUTR2 O
Hi-z Rch Analog Output Pin
19 VREFH
-
Hi-z Positive Voltage Reference Input Pin, AVDD
20 VREFL
-
Hi-z Negative Voltage Reference Input Pin, VSS2
21 VCOM
O
500Ω
Pull-down
Common Voltage Output Pin, AVDDx1/2
Large external capacitor around 2.2µF is used to reduce power-supply noise.
22 VSS2
-
-
Analog Ground Pin
23 AVDD
-
-
Analog Power Supply Pin, 3.0V3.6V
24 AOUTL3 O
Hi-z Lch Analog Output Pin
25 AOUTR3 O
Hi-z Rch Analog Output Pin
26 AOUTL4 O
Hi-z Lch Analog Output Pin
27 AOUTR4 O
Hi-z Rch Analog Output Pin
28 TEST
-
25kΩ This pin must be connected to VSS1.
Pull-down
Control Mode Select Pin
29 I2C
I
Hi-z
“L”: 3-wire serial control mode
“H”: I²C Bus serial control mode or Parallel control mode.
30 TVDD
-
-
Digital Power Supply Pin, 1.7V3.6V
31 VSS1
-
-
Digital Ground Pin
32 LDOO
O 580Ω LDO Output Pin.
Pull-down This pin must be connected to ground with 2.2uF ±50%.
Note 1. All digital input pins must not be allowed to float.
016001925-E-00
-5-
2016/03